48 lines
896 B
Text
48 lines
896 B
Text
/* Copyright (c) 2025, Sascha Willems
|
|
*
|
|
* SPDX-License-Identifier: MIT
|
|
*
|
|
*/
|
|
|
|
struct UBO
|
|
{
|
|
float4x4 projection;
|
|
float4x4 view;
|
|
float4x4 model;
|
|
float4x4 lightSpace;
|
|
float4 lightPos;
|
|
float zNear;
|
|
float zFar;
|
|
};
|
|
ConstantBuffer<UBO> ubo;
|
|
Sampler2D samplerColor;
|
|
|
|
float LinearizeDepth(float depth)
|
|
{
|
|
float n = ubo.zNear;
|
|
float f = ubo.zFar;
|
|
float z = depth;
|
|
return (2.0 * n) / (f + n - z * (f - n));
|
|
}
|
|
|
|
struct VSOutput
|
|
{
|
|
float4 Pos : SV_POSITION;
|
|
float2 UV;
|
|
};
|
|
|
|
[shader("vertex")]
|
|
VSOutput vertexMain(uint VertexIndex: SV_VertexID)
|
|
{
|
|
VSOutput output;
|
|
output.UV = float2((VertexIndex << 1) & 2, VertexIndex & 2);
|
|
output.Pos = float4(output.UV * 2.0f - 1.0f, 0.0f, 1.0f);
|
|
return output;
|
|
}
|
|
|
|
[shader("fragment")]
|
|
float4 fragmentMain(VSOutput input)
|
|
{
|
|
float depth = samplerColor.Sample(input.UV).r;
|
|
return float4((1.0 - LinearizeDepth(depth)).xxx, 1.0);
|
|
}
|